CN211311213U - Novel magnetic coagulation device - Google Patents

Abstract

The utility model discloses a novel magnetic coagulation device, comprising an adsorption zone, a coagulation zone, a flocculation zone, a water distribution zone, a sedimentation zone, a water inlet main pipe, a diatomite dosing pipe, a magnetic powder dosing pipe, and a PAC coagulant. Dosing tube, PAM flocculant dosing tube, magnetic powder regeneration tube, magnetic powder return tube, sludge discharge tube, diatomite mixing mixer, coagulation mixer, flocculation mixer, mud scraper, magnetic powder return pump, high-speed shearing machine, Magnetic Separator. The beneficial effect of the utility model is that the internal reaction time of the device is short, the floor area is small, the pollutants such as phosphorus and suspended solids can be effectively removed, and the unique microporous structure and excellent adsorption performance of algae are used to enhance the reduction of pollutants. COD, BOD, ammonia nitrogen, chromaticity and other pollution indicators, and achieve the purpose of system optimization and efficiency.

Description

A new type of magnetic coagulation device

technical field

The utility model relates to the field of water treatment, in particular to a novel magnetic coagulation device.

Background technique

Magnetic coagulation technology is a new type of high-efficiency solid-liquid separation method. It is based on contact flocculation. By adding magnetic powder during the coagulation process, it becomes a nucleating material during the coagulation process and uses its larger adsorption capacity. Adsorb and aggregate other fine particles of colloidal particles to form larger dense flocs, and use the high density characteristics of the device to make the flocs have better precipitation characteristics, so as to achieve high-efficiency solid-liquid separation. Compared with the traditional flocculation and sedimentation process, this process has the advantages of good floc settling performance and less floor space.

With the continuous improvement of sewage discharge standards in the environmental protection industry, old sewage plants are facing the expansion and upgrading of sewage facilities. However, the biggest obstacle in the process of project implementation is the problem of land occupation. Therefore, the environmental protection industry is in urgent need of multi-functional, efficient, and cost-saving. The new advanced sewage treatment process in the land.

As a mineral resource, diatomite has a unique microporous structure and excellent adsorption performance. As a filter aid, it is widely used in the purification treatment of swimming pool water, landscape water, hot spring water, and small sewage treatment equipment. , ammonia nitrogen, chromaticity and other pollution indicators have achieved good treatment results.

SUMMARY OF THE INVENTION

The utility model relates to a novel magnetic coagulation device, which mainly comprises a main structure, a process pipeline, a stirring device, a sludge concentration device and a magnetic powder recovery device. It is characterized in that the main structure mainly includes an adsorption zone (R1), a coagulation zone (R2), a flocculation zone (R3), a water distribution zone (R4), and a sedimentation zone (R5), and the process pipeline mainly includes a water inlet pipe (P1), Diatomite dosing tube (P2), magnetic powder dosing tube (P3), PAC coagulant dosing tube (P4), PAM flocculant dosing tube (P5), magnetic powder regeneration tube (P6), magnetic powder return tube ( P7), sludge discharge pipe (P 8), mixing equipment mainly includes diatomite mixing mixer (E1), coagulation mixer (E2), E3-flocculation mixer, sludge thickening equipment is sludge scraper (E4), magnetic powder The recovery equipment mainly includes a magnetic powder return pump (E5), a high-speed shearing machine (E6), and a magnetic separator (E7).

The adsorption zone is connected with the main water inlet pipe and the diatomite dosing pipe, and is equipped with a diatomite mixing mixer. The main water inlet pipe leads from the upper part of the adsorption zone to the bottom of the adsorption zone, and the diatomite dosing pipe puts the diatomite into the bottom of the adsorption zone, and uses a diatomite mixing mixer for stirring to make the diatomite fully contact with the waste water and absorb the waste water. The organic matter is mixed, and the mixed wastewater is deflected and raised, and enters the coagulation zone from the overflow port at the upper end of the adsorption zone.

The magnetic powder regeneration pipe, the magnetic powder feeding pipe and the PAC coagulant feeding pipe are connected to the coagulation zone, and the corresponding agents are respectively added to the upper end of the coagulation zone, and the coagulation mixer is used to fully stir and mix, so that the diatomite, The suspended matter and the PAC coagulant undergo adsorption, collision reaction, and flow downward, and flow to the flocculation zone through the flow hole at the bottom of the coagulation zone.

The PAM flocculant feeding pipe is connected to the flocculation zone, and goes deep into the bottom of the flocculation zone, mixed with the coagulated wastewater, and gradually forms large flocs, which overflow from the upper part to the water distribution zone, and enter the sedimentation zone from the bottom baffle.

The sedimentation zone adopts the inclined plate sedimentation technology and is equipped with a mud scraper. The waste water is separated from the mud and water quickly in the sedimentation zone. The clean water is collected and discharged through the upper overflow weir, and the sludge sinks to the bottom of the sedimentation zone. In the mud bucket in the sedimentation area, hydraulic pressure is applied to the magnetic powder regeneration pipe, and the magnetic powder return pump is used to pump it to the magnetic powder recovery equipment.

The magnetic powder recovery equipment mainly includes a magnetic powder return pump, a high-speed shearing machine (E6), and a magnetic separator (E7). The magnetic powder return pump pumps the mixed sludge to the high-speed shearing machine, and uses the high-speed centrifugal force and cutting action to break up the flocs and then send them to the magnetic separator to separate the magnetic powder from non-magnetic substances such as SS, diatomite, and pharmaceuticals. Return to the coagulation zone, and other non-magnetic substances are discharged to the sludge treatment system through the sludge discharge pipe.

As a preferred solution of the present invention, the hydraulic retention time of the adsorption zone is 15min, the hydraulic retention time of the coagulation zone and the flocculation zone is 5min, and the hydraulic retention time of the sedimentation zone is 30min.

As a preferred solution of the present utility model, the diatomite adopts diatomite powder with a particle size of 200 meshes, and is dissolved into a diatomite solution, which is added by wet method through a dosing pump.

As a preferred solution of the present utility model, both the diatomite mixing mixer and the coagulation mixer use a spiral mixer, which adopts gear transmission, and the mixing speed is block. The design speed is adjusted to 200-400r/min. Diatomite, magnetic powder and coagulant are quickly and fully mixed, and the chance of collision between colloidal particles, magnetic powder and coagulant is increased, so that colloidal particles can be destabilized and adsorbed to form floc particles. The flocculation mixer adopts a paddle mixer, and the speed is adjusted to 80-100r/min. Through slow stirring, the flocculant can connect the flocculation particles into dense flocs through adsorption, bridging, etc. The slow stirring can prevent the water from stirring violently. Destruction of the coagulated flocculation particles affects the settling effect.

As a preferred solution of the present utility model, the magnetic powder is mixed with various particle sizes, and the particle size range is 200-500 mesh. The magnetic powder within this particle size range is used as the nucleating material, and the sedimentation speed is faster than that of the small particle size magnetic powder. , the loss of magnetic powder is small, and the magnetic powder that does not participate in flocculation is less.

As a preferred solution of the present utility model, the magnetic powder return pump adopts a cam rotor pump with good wear resistance. Suction, wear-resistant, and not easy to block.

As a preferred solution of the present utility model, the magnetic separation device adopts a permanent magnetic rotating drum magnetic separator, the magnetic field strength on the surface of the disk is not less than 4000Gs, the magnetic field strength when it flows to the center is not less than 800Gs, and the overcurrent speed is between 0.08 and 0.1m. /s, the recovery rate of magnetic powder can reach more than 99%.

Description of drawings

Figure 1 is a schematic structural diagram of the utility model.

R1-adsorption zone, R2-coagulation zone, R3-flocculation zone, R4-water distribution zone, R5-precipitation zone, P1-water inlet pipe, P2-diatomite dosing pipe, P3-magnetic powder dosing pipe, P4- PAC coagulant dosing pipe, P5-PAM flocculant dosing pipe, P6-magnetic powder regeneration pipe, P7-magnetic powder return pipe, P8-sludge discharge pipe, E1-diatomite mixing mixer, E2-coagulation mixer, E3-flocculation mixer, E4-scraper, E5-magnetic powder return pump, E6-high-speed shearing machine, E7-magnetic separator

Detailed ways

The utility model relates to a novel magnetic coagulation device, which mainly comprises a main structure, a process pipeline, a stirring device, a sludge concentration device and a magnetic powder recovery device. It is characterized in that the main structure mainly includes an adsorption zone (R1), a coagulation zone (R2), a flocculation zone (R3), a water distribution zone (R4), and a sedimentation zone (R5), and the process pipeline mainly includes a water inlet pipe (P1), Diatomite dosing tube (P2), magnetic powder dosing tube (P3), PAC coagulant dosing tube (P4), PAM flocculant dosing tube (P5), magnetic powder regeneration tube (P6), magnetic powder return tube ( P7), sludge discharge pipe (P 8), mixing equipment mainly includes diatomite mixing mixer (E1), coagulation mixer (E2), E3-flocculation mixer, sludge thickening equipment is sludge scraper (E4), magnetic powder The recovery equipment mainly includes a magnetic powder return pump (E5), a high-speed shearing machine (E6), and a magnetic separator (E7).

The adsorption zone is connected with the main water inlet pipe and the diatomite dosing pipe, and is equipped with a diatomite mixing mixer. The main water inlet pipe leads from the upper part of the adsorption zone to the bottom of the adsorption zone, and the diatomite dosing pipe puts the diatomite into the bottom of the adsorption zone, and uses a diatomite mixing mixer for stirring to make the diatomite fully contact with the waste water and absorb the waste water. The organic matter is mixed, and the mixed wastewater is deflected and raised, and enters the coagulation zone from the overflow port at the upper end of the adsorption zone.

The magnetic powder regeneration pipe, the magnetic powder feeding pipe and the PAC coagulant feeding pipe are connected to the coagulation zone, and the corresponding agents are respectively added to the upper end of the coagulation zone, and the coagulation mixer is used to fully stir and mix, so that the diatomite, The suspended matter and the PAC coagulant undergo adsorption, collision reaction, and flow downward, and flow to the flocculation zone through the flow hole at the bottom of the coagulation zone.

The PAM flocculant feeding pipe is connected to the flocculation zone, and goes deep into the bottom of the flocculation zone, mixed with the coagulated wastewater, and gradually forms large flocs, which overflow from the upper part to the water distribution zone, and enter the sedimentation zone from the bottom baffle.

The sedimentation zone adopts the inclined plate sedimentation technology and is equipped with a mud scraper. The waste water is separated from the mud and water quickly in the sedimentation zone. The clean water is collected and discharged through the upper overflow weir, and the sludge sinks to the bottom of the sedimentation zone. In the mud bucket in the sedimentation area, hydraulic pressure is applied to the magnetic powder regeneration pipe, and the magnetic powder return pump is used to pump it to the magnetic powder recovery equipment.

The magnetic powder recovery equipment mainly includes a magnetic powder return pump, a high-speed shearing machine (E6), and a magnetic separator (E7). The magnetic powder return pump pumps the mixed sludge to the high-speed shearing machine, and uses the high-speed centrifugal force and cutting action to break up the flocs and then send them to the magnetic separator to separate the magnetic powder from non-magnetic substances such as SS, diatomite, and pharmaceuticals. Return to the coagulation zone, and other non-magnetic substances are discharged to the sludge treatment system through the sludge discharge pipe.

Claims (6)

1. A novel magnetic coagulation device, comprising main structure, process pipeline, stirring equipment, sludge thickening equipment, magnetic powder recovery equipment, is characterized in that the main structure mainly comprises adsorption zone (R1), coagulation zone (R2), The flocculation area (R3), the water distribution area (R4), and the sedimentation area (R5), the process pipeline mainly includes the water inlet pipe (P1), the diatomite dosing pipe (P2), the magnetic powder dosing pipe (P3), and the PAC mixing pipe. Coagulant dosing pipe (P4), PAM flocculant dosing pipe (P5), magnetic powder regeneration pipe (P6), magnetic powder return pipe (P7), sludge discharge pipe (P8), stirring equipment mainly includes diatomite mixing mixer (E1), coagulation mixer (E2), E3-flocculation mixer, sludge thickening equipment is sludge scraper (E4), magnetic powder recovery equipment mainly includes magnetic powder return pump (E5), high-speed shearing machine (E6), magnetic separation Machine (E7); the adsorption zone is connected to the water inlet pipe, the diatomite dosing pipe, and is equipped with a diatomite mixing mixer; the water inlet pipe leads from the upper part of the adsorption zone to the bottom of the adsorption zone, and the diatomite dosing pipe The diatomite is put into the bottom of the adsorption zone, and the diatomite mixing mixer is used for stirring, so that the diatomite and the wastewater are fully contacted, and the organic matter in the wastewater is adsorbed. Coagulation zone; the coagulation zone is connected to the magnetic powder regeneration tube, the magnetic powder feeding tube, and the PAC coagulant feeding tube, and the corresponding chemicals are respectively added to the upper end of the coagulation zone, and the coagulation mixer is used to fully stir and mix, so that the silicon The algae, suspended solids and PAC coagulant undergo adsorption and collision reaction, and flow downward, and flow to the flocculation zone through the flow hole at the bottom of the coagulation zone; the flocculation zone is connected to the PAM flocculant feeding pipe, and flocculates deeply The bottom of the zone is mixed with the coagulated wastewater to gradually form large flocs, which overflow from the upper part to the water distribution zone, and enter the sedimentation zone from the bottom baffle; the sedimentation zone adopts the inclined plate sedimentation technology and is equipped with a mud scraper. Rapid separation of mud and water is realized in the sedimentation area. The clean water is collected and discharged through the upper overflow weir, and the sludge sinks to the bottom of the sedimentation area. Magnetic powder recovery equipment; the magnetic powder recovery equipment mainly includes magnetic powder return pump, high-speed shearing machine (E6), magnetic separator (E7); magnetic powder return pump pumps mixed sludge to high-speed shearing machine, using high-speed centrifugal force and cutting action Disperse the floc and send it to the magnetic separator to separate the magnetic powder from non-magnetic substances such as SS, diatomite, and pharmaceuticals. system. 2. A kind of novel magnetic coagulation device according to claim 1 is characterized in that the hydraulic retention time of adsorption zone is 15min, the hydraulic retention time of coagulation zone and flocculation zone is 5min, and the hydraulic retention time of sedimentation zone is 30min. 3. A new type of magnetic coagulation device according to claim 1, characterized in that the diatomite mixing mixer and the coagulation mixer both use a screw type mixer and the rotation speed is 200-400r/min, and the flocculation mixer adopts a paddle mixer, The rotational speed is 80～100r/min. 4. A new type of magnetic coagulation device according to claim 1, characterized in that, a diatomite dosing pipe, a magnetic powder dosing pipe, a PAC coagulant dosing pipe, a PAM flocculant dosing pipe, and a magnetic powder return pipe The elevation of the outlet of the pipe is the same as the elevation of the water inlet of each area; the elevation of the outlet of the diatomite dosing pipe is the same as the elevation of the outlet of the main inlet pipe, both are 250mm from the bottom of the pool, the magnetic powder dosing pipe, the PAC coagulant dosing pipe and the magnetic powder return pipe The outlet elevation is designed to be 250mm below the liquid level, and the outlet elevation of the PAM flocculant dosing pipe is located at the horizontal centerline of the inlet water flow tunnel in the flocculation zone. 5. A new type of magnetic coagulation device according to claim 1, characterized in that after the mixed sludge in the sedimentation zone is separated from the magnetic powder and the flocs by the magnetic powder recovery equipment, the magnetic powder is recirculated to the coagulation zone, and the separated sludge Discharge to sludge treatment system. 6. A new type of magnetic coagulation device according to claim 1, characterized in that, the particle size of the magnetic powder is 200-500 mesh, the concentration of the magnetic powder in the coagulation zone is 200 mg/L, the residual magnetic powder in the waste water is the least, and the recovery rate of the magnetic powder is acceptable. The dosage of PAC and PAM was 40mg/L and 1.5mg/L respectively.

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